Other than Ilum I can't seem to find other planets with confirmed kyber crystal deposits. All Wookieepedia tells me is that kyber crystals were found on "scattered planets" so my question is what are the odds one of those planets might be Ord Mantell? You know, just out of curiosity. >.>

Kyber crystals are a rather strange topic when it comes to the new canon. It seems like it is no longer the super powerful lightsaber crystals of the past/Legends, but rather any general lightsaber crystals now. And strangely, the color of the crystals isn't natural but change only when the Force user have come in contact with it; otherwise, they are colorless. For an example, Kylo Ren has a red "cracked kyber crystal," so the raspy sounds it makes and the fiery edge isn't the cause of the kyber, but rather because it is cracked.